.banner-wrap {
    width: 100%;
    height: 285px;
    background-color: #bfa;
    background: url(../upload/img1-b.jpg) no-repeat;
    background-size: cover;
}

.banner {
    width: 980px;
    height: inherit;
    box-sizing: border-box;
    position: relative;
}

.banner_img {
    height: inherit;
    overflow: hidden;
    width: 730px;
    padding-left: 0;
    padding-right: 0;
}

.banner_img img {
    height: inherit;
    width: 730px;
}

.banner_down {
    position: relative;
    height: inherit;
    background: url(../images/download.png);
}

.banner_down>span {
    position: absolute;
    bottom: 0;
    font-size: 12px;
    margin: 10px auto;
    text-align: center;
    color: #8d8d8d;
}

.banner_img_ul {
    position: relative;
}

.banner_img_ul li {
    position: absolute;
}

.banner_btn .bannerBtn {
    width: 37px;
    height: 63px;
    background-color: pink;
    background: url(../images/banner.png) no-repeat;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    border: 0;
}

.banner_btn .last {
    background-position: 0 -360px;
    left: -50px;
}

.banner_btn .last:hover {
    background-position: 0 -430px;

}

.banner_btn .next {
    background-position: 0 -510px;
    right: -45px;
}

.banner_btn .next:hover {
    background-position: 0 -580px;

}

.btn_down {
    width: 215px;
    height: 56px;
    position: absolute;
    bottom: 44px;
    left: 19px;
    background: url(../images/download.png) -19px -185px no-repeat;
}

.btn_down:hover {
    display: block;
    cursor: pointer;
    background: url(../images/download.png) -0px -289px no-repeat;
}